it depends on the joke and how often you hear it, as an adelaide girl I hear "wind your clock back 30 years" every flight, however when I was in Sydney coming back to adelaide as a pax a few years ago, over the boarding announcement in the terminal they said "as this is a nearly empty flight could all passengers please sit near the window when we taxi past the qantas plane so they think we're full"
which did get a giggle out of me